Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1107310928 (LWP 28266)]
0x0000000000000a61 in ?? ()
(gdb) bt full
#0  0x0000000000000a61 in ?? ()
No symbol table info available.
#1  0x00000000011601d0 in ?? ()
No symbol table info available.
#2  0x0000000000000064 in ?? ()
No symbol table info available.
#3  0x00000000004c0e39 in WorldRunnable::run (this=<value optimized out>)
    at WorldRunnable.cpp:61
        diff = 3813930959
        realCurrTime = 4096
        realPrevTime = <value optimized out>
        prevSleepTime = 1107308432
#4  0x00002ba6153cd851 in ZThread::ThreadImpl::dispatch (parent=0xb88380,
    impl=0x115f6d0, task=@0x42003100) at ThreadImpl.cxx:407
No locals.
#5  0x00002ba6153cfc39 in ZThread::(anonymous namespace)::Launcher::run (
    this=0x7fff965c37f0) at ThreadImpl.cxx:49
No locals.
#6  0x00002ba6153d34be in _dispatch (arg=0x11609b0) at posix/ThreadOps.cxx:137
        __PRETTY_FUNCTION__ = "void* ZThread::_dispatch(void*)"
#7  0x00002ba6155e6317 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#8  0x00002ba61606ad5d in clone () from /lib/libc.so.6
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#9  0x0000000000000000 in ?? ()
No symbol table info available.